APA (7th ed.) Citation

De Camp, L. S. (1983). The fringe of the unknown. Prometheus Books.

Chicago Style (17th ed.) Citation

De Camp, L. Sprague. The Fringe of the Unknown. Buffalo, N.Y.: Prometheus Books, 1983.

MLA (9th ed.) Citation

De Camp, L. Sprague. The Fringe of the Unknown. Prometheus Books, 1983.